24 August 2015 Development of the strontium iodide coded aperture (SICA) instrument
Author Affiliations +
The work reports on the development of a Strontium Iodide Coded Aperture (SICA) instrument for use in space-based astrophysics, solar physics, and high-energy atmospheric physics. The Naval Research Laboratory is developing a prototype coded aperture imager that will consist of an 8 x 8 array of SrI2:Eu detectors, each read out by a silicon photomultiplier. The array would be used to demonstrate SrI2:Eu detector performance for space-based missions. Europium-doped strontium iodide (SrI2:Eu) detectors have recently become available, and the material is a strong candidate to replace existing detector technology currently used for space-based gamma-ray astrophysics research. The detectors have a typical energy resolution of 3.2% at 662 keV, a significant improvement over the 6.5% energy resolution of thallium-doped sodium iodide. With a density of 4.59 g/cm and a Zeff of 49, SrI2:Eu has a high efficiency for MeV gamma-ray detection. Coupling this with recent improvements in silicon photomultiplier technology (i.e., no bulky photomultiplier tubes) creates high-density, large-area, low-power detector arrays with good energy resolution. Also, the energy resolution of SrI2:Eu makes it ideal for use as the back plane of a Compton telescope.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Lee J. Mitchell, Lee J. Mitchell, Bernard F. Phlips, Bernard F. Phlips, J. Eric Grove, J. Eric Grove, Ryan Cordes, Ryan Cordes, } "Development of the strontium iodide coded aperture (SICA) instrument", Proc. SPIE 9601, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XIX, 96010A (24 August 2015); doi: 10.1117/12.2195575; https://doi.org/10.1117/12.2195575


SuperAGILE at launch
Proceedings of SPIE (June 14 2006)
The other end of the scale Coded apertures in...
Proceedings of SPIE (November 18 2012)
Germanium gamma-ray spectrometer PGS for the MARS-96 mission
Proceedings of SPIE (October 30 1996)
The SORDS trimodal imager detector arrays
Proceedings of SPIE (April 30 2009)
Prototype Compton imager for special nuclear material
Proceedings of SPIE (May 23 2006)

Back to Top